Method of treating surfaces to be protected from fouling.



UNITED STATES PATENT OFFICE.

ROBERT BELL, OF LONDON, ENGLAND.

METHOD or TREATING SURFACES TO BE PROTECTED FROM FOULING.

.tatentecl April 17, 1906.

Application filed May 17, 1905. Serial lfo. 260,880.

To all whom, it may concern.-

Be it known that I, ROBERT BELL, a subject of the King of the United Kingdom of caught by the paint to form a superposed.

Great Britain and Ireland, residing at Lon- 1 don, L, England, have mventcd new and useful Improvements in Methods of Treating Surfaces to be Protected from Fouling, of which the following is a specification.

This invention relates to a method of treatbe rendered antiseptic.

In the invention the surface to be treated is first coated with a layer of paint, varnish, or the like, and before said layer is dry flowers of sulfur, ground sulfur, or equivalent pulverulent insoluble iinpalpable sterilizing agent is forced or blown into the same by the action of a current of compressed air at a pressure of about forty pounds. lf dcsircd, the surface may be smoothed by rolling. lutely to prevent existence of organic life on the protected surface. The invention may therefore be applied to provide a cheap and most effective antifoulin covering for the ing surfaces to be protected from fouling or to I claim, and desire to secure by Letters Pat- 1 cut of the United States, is

The effect of this treatment is absosides and bottoms of ships hulls, piles, piers,

and submerged structures generally or to provide an antiseptic coating for walls of buildings. such as hospitals, urinals. waterclosets, and the like.

Sulfur has alr ady been proposed as an ingredient of antifouling compositions for ships: but t'nc practice heretofore has been to encapsulc the sulfur in oil or analogous matc rial, whereby the said sulfur was prevented I from exercising any effective sterilizing action.

.-\ccording to thc hcrcindcscribcd.

process the line powdered sulfur forms a film or crust on the surface of the paint and constitutes an absolutely protective sheath through which the growths cannot pcnctratc and upon which they cannot sctllc.

()wing I to the impalpablc nature. of the scrilizing" agent pulverulcnt sulfur or the like is merely 1. A method of treating surfaces to be protected from fouling or to be rendered antiseptic consisting in coating the said surfaces with a layer of paint, varnish or the like and forcing sulfur into said layer, by the action of compressed air, before drying.

2. A method of treating surfaces to be protcctcd from fouling or to be rendered antiseptic consisting in coating the said surfaces with a layer of paint, varnish or the like and blowing powdered sulfur on said layer so as to snpcrpose at protecting crust on said layer, as described.

3. A method of treating surfaces to be profccfcd from fouling or to bc rcndclcd antiseptic consisting in coating the said surfaces with an adhesive layer and sn'pcrposing a layer of pondered sulfur on said adhesive layer.

-l. An antifouling covering consisting of a layer of paint, varnish or the like and a supcrposcd layer of powdered sulfur.

ln testimony whereof I have signed my name to this specification in the presence of two subscribing \\'ifncsscs.

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Wit ncsscs:

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